|
Magnetic Properties
|
|
Grade
|
Br
(Gauss)
|
Hc
(Oersteds)
|
Hci
(Oersteds)
|
BHmax
(MGOe)
|
Temp.
Coefficient of Br
(%/°C)
|
Max.
Op. Temp. (°C)
|
Density
(lbs/in3)
|
|
4SB
|
3,460
|
3,460
|
9,600
|
3
|
-0.10
|
150
|
0.217
|
|
B10N
|
6,800
|
5,780
|
10,300
|
10
|
-0.10
|
150
|
0.217
|
|
24
|
9,800
|
7,500
|
8,000
|
24
|
-0.12
|
80
|
0.275
|
|
24UH
|
10,000
|
9,600
|
41,000
|
24
|
-0.10
|
210
|
0.271
|
|
27
|
10,850
|
9,650
|
13,500
|
27
|
-0.12
|
80
|
0.267
|
|
27H
|
10,600
|
10,100
|
17,000
|
27
|
-0.11
|
150
|
0.271
|
|
28
|
10,800
|
10,100
|
17,000
|
28
|
-0.11
|
150
|
0.271
|
|
28UH
|
10,900
|
10,400
|
25,000
|
28
|
-0.09
|
190
|
0.271
|
|
30
|
11,400
|
10,400
|
13,500
|
30
|
-0.12
|
150
|
0.267
|
|
30H
|
11,200
|
10,700
|
17,000
|
30
|
-0.11
|
150
|
0.271
|
|
32SH
|
11,600
|
11,100
|
31,000
|
32
|
-0.10
|
180
|
0.271
|
|
35
|
12,300
|
11,300
|
14,000
|
35
|
-0.11
|
150
|
0.271
|
|
35SH
|
12,200
|
11,700
|
26,000
|
36
|
-0.10
|
160
|
0.271
|
|
38H
|
12,550
|
11,700
|
17,000
|
39
|
-0.10
|
130
|
0.271
|
|
39H
|
12,800
|
12,300
|
21,000
|
40
|
-0.10
|
150
|
0.271
|
|
40
|
12,900
|
12,400
|
12,000
|
40
|
-0.11
|
130
|
0.271
|
|
42
|
13,050
|
12,500
|
14,000
|
41
|
-0.11
|
120
|
0.271
|
|
42H
|
13,300
|
12,700
|
17,000
|
43
|
-0.10
|
120
|
0.271
|
|
45
|
13,550
|
11,750
|
11,000
|
44
|
-0.12
|
100
|
0.271
|
|
45H
|
13,500
|
12,900
|
15,000
|
45
|
-0.11
|
100
|
0.271
|
|
48
|
14,100
|
12,900
|
13,500
|
48
|
-0.12
|
80
|
0.271
|
|
|
|
Physical and Thermal Properties
|
| Description |
SmCo
1-5 Alloys |
SmCo
2-17 Alloys |
NdFeB |
|
Mechanical
Properties:
|
|
Modulus
of elasticy
|
23
x 106
psi
|
17
x 106
psi
|
22
x 106
psi
|
|
Ultimate
tensile strength
|
6
x 103
psi
|
5
x 103
psi
|
12
x 103
psi
|
|
Density
|
8.2
g/cc
|
8.4
g/cc
|
7.4
g/cc
|
|
Coefficient
of thermal expansion:
|
|
Perpendicular
to orientation
|
13
x 10-6/°C
|
11
x 10-6/°C
|
-4.8
x 10-6/°C
|
|
Parallel
to orientation
|
6
x 10-6/°C
|
8
x 10-6/°C
|
3.4
x 10-6/°C
|
|
Electrical
resistivity
|
5µ
ohm cm
|
86µ
ohm cm
|
160µ
ohm cm
|
|
Magnetic
Properties:
|
|
Curie
temperature
|
750°C
|
825°C
|
310°C
|
|
Reversible
temperature coefficient of residual induction (-100°C to + 100°C)
|
-0.043%
/ °C
|
-0.03%
/°C
|
-0.09
to -0.13%
/°C
|
|
Recoil
permeability
|
1.05
|
1.05
|
1.05
|
|
Max.
service temperature*
|
250°C
|
300°C
|
150°C
|
| * Maximum
Service Temperature depends on permeance coefficient of magnetic circuit.
Temperatures shown here are guidelines only |
|
|
